package com.sky.service.impl;

import com.alibaba.druid.support.json.JSONUtils;
import com.alibaba.fastjson.JSON;
import com.github.pagehelper.Page;
import com.github.pagehelper.PageHelper;
import com.github.xiaoymin.knife4j.core.util.CollectionUtils;
import com.sky.constant.MessageConstant;
import com.sky.context.BaseContext;
import com.sky.dto.*;
import com.sky.entity.AddressBook;
import com.sky.entity.OrderDetail;
import com.sky.entity.Orders;
import com.sky.entity.ShoppingCart;
import com.sky.exception.AddressBookBusinessException;
import com.sky.exception.OrderBusinessException;
import com.sky.exception.ShoppingCartBusinessException;
import com.sky.mapper.AddressBookMapper;
import com.sky.mapper.OrderDetailMapper;
import com.sky.mapper.OrderMapper;
import com.sky.mapper.ShoppingCartMapper;
import com.sky.result.PageResult;
import com.sky.service.OrderService;
import com.sky.vo.OrderPaymentVO;
import com.sky.vo.OrderStatisticsVO;
import com.sky.vo.OrderSubmitVO;
import com.sky.vo.OrderVO;
import com.sky.websocket.WebSocketServer;
import lombok.extern.slf4j.Slf4j;
import org.springframework.beans.BeanUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.core.annotation.Order;
import org.springframework.stereotype.Service;
import org.springframework.transaction.annotation.Transactional;

import java.time.LocalDateTime;
import java.util.ArrayList;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
import java.util.stream.Collectors;

/**
 * 订单
 */
@Service
@Slf4j
public class OrderServiceImpl implements OrderService {
    @Autowired
    private OrderMapper orderMapper;
    @Autowired
    private OrderDetailMapper orderDetailMapper;
    @Autowired
    private ShoppingCartMapper shoppingCartMapper;
    @Autowired
    private AddressBookMapper addressBookMapper;
    @Autowired
    private WebSocketServer webSocketServer;


    /**
     * 用户下单
     *
     * @param ordersSubmitDTO
     * @return
     */
    @Transactional
    public OrderSubmitVO submitOrder(OrdersSubmitDTO ordersSubmitDTO) {
        //异常情况的处理（收货地址为空、超出配送范围、购物车为空）
        AddressBook addressBook = addressBookMapper.getById(ordersSubmitDTO.getAddressBookId());
        if (addressBook == null) {
            throw new AddressBookBusinessException(MessageConstant.ADDRESS_BOOK_IS_NULL);
        }

        Long userId = BaseContext.getCurrentId();
        ShoppingCart shoppingCart = new ShoppingCart();
        shoppingCart.setUserId(userId);

        //查询当前用户的购物车数据
        List<ShoppingCart> shoppingCartList = shoppingCartMapper.list(shoppingCart);
        if (shoppingCartList == null || shoppingCartList.size() == 0) {
            throw new ShoppingCartBusinessException(MessageConstant.SHOPPING_CART_IS_NULL);
        }

        //构造订单数据
        Orders order = new Orders();
        BeanUtils.copyProperties(ordersSubmitDTO,order);
        order.setPhone(addressBook.getPhone());
        order.setAddress(addressBook.getDetail());
        order.setConsignee(addressBook.getConsignee());
        order.setNumber(String.valueOf(System.currentTimeMillis()));
        order.setUserId(userId);
        order.setStatus(Orders.PENDING_PAYMENT);
        order.setPayStatus(Orders.UN_PAID);
        order.setOrderTime(LocalDateTime.now());

        //向订单表插入1条数据
        orderMapper.insert(order);

        //订单明细数据
        List<OrderDetail> orderDetailList = new ArrayList<>();
        for (ShoppingCart cart : shoppingCartList) {
            OrderDetail orderDetail = new OrderDetail();
            BeanUtils.copyProperties(cart, orderDetail);
            orderDetail.setOrderId(order.getId());
            orderDetailList.add(orderDetail);
        }

        //向明细表插入n条数据
        orderDetailMapper.insertBatch(orderDetailList);

        //清理购物车中的数据
        shoppingCartMapper.deleteByUserId(userId);

        //封装返回结果
        OrderSubmitVO orderSubmitVO = OrderSubmitVO.builder()
                .id(order.getId())
                .orderNumber(order.getNumber())
                .orderAmount(order.getAmount())
                .orderTime(order.getOrderTime())
                .build();

        return orderSubmitVO;
    }

    @Override
    public OrderPaymentVO payment(OrdersPaymentDTO ordersPaymentDTO) throws Exception {
        return null;
    }

    @Override
    public void paySuccess(String outTradeNo) {
        Long userId = BaseContext.getCurrentId();

        // 根据订单号查询订单
        Orders ordersDB = orderMapper.getByNumberAndUserId(outTradeNo,userId);

        // 根据订单id更新订单的状态、支付方式、支付状态、结账时间
        Orders orders = Orders.builder()
                .id(ordersDB.getId())
                .status(Orders.TO_BE_CONFIRMED)
                .payStatus(Orders.PAID)
                .checkoutTime(LocalDateTime.now())
                .build();

        orderMapper.update(orders);

        //通过websocket向客户端浏览器推送消息
        Map map = new HashMap();
        map.put("type", 1); //来单提醒
        map.put("orderId", orders.getId());
        map.put("content", "订单号:" + outTradeNo);

        webSocketServer.sendToAllClient(JSON.toJSONString(map));
    }

    public PageResult pageQuery4User(int pageNum,int pageSize,Integer status){
        //设置分页
        PageHelper.startPage(pageNum,pageSize);
        OrdersPageQueryDTO ordersPageQueryDTO = new OrdersPageQueryDTO();
        ordersPageQueryDTO.setUserId(BaseContext.getCurrentId());
        ordersPageQueryDTO.setStatus(status);
        //分页查询条件
        Page<Orders> page = orderMapper.pageQuery(ordersPageQueryDTO);
        List<OrderVO> list = new ArrayList<>();
        //查询出订单明细，并封装入OrderVO进行响应
        if (page!=null&&page.getTotal() >0){
            for (Orders orders : page){
                Long orderId = orders.getId();//订单id
                //查询订单明细
                List<OrderDetail> orderDetails = orderDetailMapper.getByOrderId(orderId);
                OrderVO orderVO = new OrderVO();
                BeanUtils.copyProperties(orders,orderVO);
                orderVO.setOrderDetailList(orderDetails);
                list.add(orderVO);
            }
        }
        return new PageResult(page.getTotal(),list);
    }


    /**
     * 查询订单详情
     *
     * @param id
     * @return
     */
    public OrderVO details(Long id) {
        //根据id查询订单
        Orders orders = orderMapper.getById(id);

        //查询该订单对应的菜品、套餐明细
        List<OrderDetail> orderDetailList = orderDetailMapper.getByOrderId(id);

        //封装订单明细
        OrderVO orderVO = new OrderVO();
        BeanUtils.copyProperties(orders, orderVO);
        orderVO.setOrderDetailList(orderDetailList);

        return orderVO;
    }

    /**
     * 用户取消订单
     *
     * @param id
     */
    public void userCancelByOrderId(Long id) throws Exception {
        //根据id查询订单
        Orders order = orderMapper.getById(id);

        //检验订单是否存在
        if (order == null) {
            throw new OrderBusinessException(MessageConstant.ORDER_NOT_FOUND);
        }

        //订单状态 1待付款 2待接单 3已接单 4派送中 5已完成 6已取消
        if (order.getStatus() > 2) {
            throw new OrderBusinessException(MessageConstant.ORDER_STATUS_ERROR);
        }

        //构造新订单
        Orders newOrder = new Orders();
        newOrder.setId(id);

        //订单处于待接单状态下取消, 需要进行退款
        if (order.getStatus().equals(Orders.TO_BE_CONFIRMED)) {
        /*
        //调用微信支付退款接口
        weChatPayUtil.refund(
                order.getNumber(), //商户订单号
                order.getNumber(), //商户退款单号
                new BigDecimal(0.01),//退款金额，单位 元
                new BigDecimal(0.01));//原订单金额
        */
            newOrder.setPayStatus(Orders.REFUND);  //设置支付状态为退款
        }

        // 更新订单状态、取消原因、取消时间
        newOrder.setStatus(Orders.CANCELLED);
        newOrder.setCancelReason("用户取消");
        newOrder.setCancelTime(LocalDateTime.now());
        orderMapper.update(newOrder);
    }

    /**
     * 再来一单
     *
     * @param id
     */
    public void repetition(Long id) {
        //获取当前用户id
        Long userId = BaseContext.getCurrentId();

        //根据订单id查询当前订单详情
        List<OrderDetail> orderDetailList = orderDetailMapper.getByOrderId(id);

        //将订单详情对象转换为购物车对象
        List<ShoppingCart> shoppingCartList = orderDetailList.stream().map(x -> {
            ShoppingCart shoppingCart = new ShoppingCart();

            //将原订单详情里面的菜品套餐信息复制到购物车对象中
            BeanUtils.copyProperties(x, shoppingCart, "id");    //忽略id属性
            shoppingCart.setUserId(userId);
            shoppingCart.setCreateTime(LocalDateTime.now());

            return shoppingCart;
        }).collect(Collectors.toList());

        //将购物车对象批量插入到购物车表中
        shoppingCartMapper.insertBatch(shoppingCartList);
    }

    /**
     * 订单搜索
     *
     * @param ordersPageQueryDTO
     * @return
     */
    public PageResult conditionSearch(OrdersPageQueryDTO ordersPageQueryDTO) {
        //开始分页查询
        PageHelper.startPage(ordersPageQueryDTO.getPage(), ordersPageQueryDTO.getPageSize());

        Page<Orders> page = orderMapper.pageQuery(ordersPageQueryDTO);

        //部分订单, 需要我们返回订单菜品信息
        List<OrderVO> orderVOList = getOrderVOList(page);

        return new PageResult(page.getTotal(), orderVOList);
    }

    /**
     * 获取订单菜品信息
     *
     * @param page
     * @return
     */
    private List<OrderVO> getOrderVOList(Page<Orders> page) {
        //需要返回订单菜品信息, 自定义OrderVO响应结果
        List<OrderVO> orderVOList = new ArrayList<>();

        List<Orders> ordersList = page.getResult();
        if (!CollectionUtils.isEmpty(ordersList)) {
            ordersList.forEach(orders -> {
                OrderVO orderVO = new OrderVO();
                BeanUtils.copyProperties(orders, orderVO);
                String orderDishes = getOrderDishesStr(orders); //获取订单菜品信息

                orderVO.setOrderDishes(orderDishes);
                orderVOList.add(orderVO);
            });
        }

        return orderVOList;
    }

    /**
     * 获取订单菜品信息字符串
     *
     * @param orders
     * @return
     */
    private String getOrderDishesStr(Orders orders) {
        //查询订单菜品详情信息
        List<OrderDetail> orderDetailList = orderDetailMapper.getByOrderId(orders.getId());

        //将每一条订单菜品信息拼接位字符串
        List<String> orderDishList = orderDetailList.stream().map(x -> {
            return x.getName() + "*" + x.getNumber() + ";";
        }).collect(Collectors.toList());

        //将该订单对应的所有菜品信息拼接在一起
        return String.join("", orderDishList);
    }

    /**
     * 各个状态的订单数量统计
     *
     * @return
     */
    public OrderStatisticsVO statistics() {
        //查询各个状态的订单数量
        Integer toBeConfirmed = orderMapper.countStatus(Orders.TO_BE_CONFIRMED);//待接单
        Integer confirmed = orderMapper.countStatus(Orders.CONFIRMED);//待派送
        Integer deliveryInProgress = orderMapper.countStatus(Orders.DELIVERY_IN_PROGRESS);//派送中

        //封装数据
        OrderStatisticsVO orderStatisticsVO = new OrderStatisticsVO();
        orderStatisticsVO.setToBeConfirmed(toBeConfirmed);
        orderStatisticsVO.setConfirmed(confirmed);
        orderStatisticsVO.setDeliveryInProgress(deliveryInProgress);

        return orderStatisticsVO;
    }

    /**
     * 接单
     *
     * @param ordersConfirmDTO
     */
    public void confirm(OrdersConfirmDTO ordersConfirmDTO) {
        Orders orders = Orders.builder()
                .id(ordersConfirmDTO.getId())
                .status(Orders.CONFIRMED)
                .build();

        orderMapper.update(orders);
    }

    /**
     * 拒单
     *
     * @param ordersRejectionDTO
     */
    public void rejection(OrdersRejectionDTO ordersRejectionDTO) {
        //根据id查询订单
        Orders orders = orderMapper.getById(ordersRejectionDTO.getId());

        //订单只有存在并且状态为待接单才可以拒单
        if (orders == null || !orders.getStatus().equals(Orders.TO_BE_CONFIRMED)) {
            throw new OrderBusinessException(MessageConstant.ORDER_STATUS_ERROR);
        }

        //如果用户已支付, 需要退款
        Integer payStatus = orders.getPayStatus();
        if (payStatus.equals(Orders.PAID)) {
        /*
        //用户已支付，需要退款
        String refund = weChatPayUtil.refund(
                orders.getNumber(),
                orders.getNumber(),
                new BigDecimal(0.01),
                new BigDecimal(0.01));
        log.info("申请退款：{}", refund);
        */
            log.info("拒单,退款：{}元", orders.getAmount());
        }

        //更新订单状态、拒单原因和取消时间
        Orders newOrder = new Orders();
        newOrder.setId(orders.getId());
        newOrder.setStatus(Orders.CANCELLED);   //已取消
        newOrder.setRejectionReason(ordersRejectionDTO.getRejectionReason());
        newOrder.setCancelTime(LocalDateTime.now());

        orderMapper.update(newOrder);
    }

    /**
     * 商家取消订单
     *
     * @param ordersCancelDTO
     */
    public void cancel(OrdersCancelDTO ordersCancelDTO) {
        //根据id查询订单
        Orders orders = orderMapper.getById(ordersCancelDTO.getId());

        //如果用户已支付, 需要退款
        Integer payStatus = orders.getPayStatus();
        if (payStatus.equals(Orders.PAID)) {
        /*
        //用户已支付，需要退款
        String refund = weChatPayUtil.refund(
                orders.getNumber(),
                orders.getNumber(),
                new BigDecimal(0.01),
                new BigDecimal(0.01));
        log.info("申请退款：{}", refund);
        */
            log.info("商家取消订单,退款：{}元", orders.getAmount());
        }

        //更新订单状态、取消原因和取消时间
        Orders newOrder = new Orders();
        newOrder.setId(orders.getId());
        newOrder.setStatus(Orders.CANCELLED);   //已取消
        newOrder.setCancelReason(ordersCancelDTO.getCancelReason());
        newOrder.setCancelTime(LocalDateTime.now());

        orderMapper.update(newOrder);
    }

    /**
     * 派送订单
     *
     * @param id
     */
    public void delivery(Long id) {
        //根据id查询订单
        Orders orders = orderMapper.getById(id);

        //校验订单是否存在并且状态为已接单
        if (orders == null || !orders.getStatus().equals(Orders.CONFIRMED)) {
            throw new OrderBusinessException(MessageConstant.ORDER_STATUS_ERROR);
        }

        //更新订单状态
        Orders newOrder = Orders.builder()
                .id(id)
                .status(Orders.DELIVERY_IN_PROGRESS)
                .build();

        orderMapper.update(newOrder);
    }

    /**
     * 完成订单
     *
     * @param id
     */
    public void complete(Long id) {
        //根据id查询订单
        Orders orders = orderMapper.getById(id);

        //校验订单是否存在并且状态为派送中
        if (orders == null || !orders.getStatus().equals(Orders.DELIVERY_IN_PROGRESS)) {
            throw new OrderBusinessException(MessageConstant.ORDER_STATUS_ERROR);
        }

        //更新订单状态
        Orders newOrder = Orders.builder()
                .id(id)
                .status(Orders.COMPLETED)
                .build();

        orderMapper.update(newOrder);
    }

    /**
     * 用户催单
     *
     * @param id
     */
    public void reminder(Long id) {
        //查询订单是否存在
        Orders orders = orderMapper.getById(id);
        if (orders == null) {
            throw new OrderBusinessException(MessageConstant.ORDER_NOT_FOUND);
        }

        //基于websocket实现催单
        HashMap map = new HashMap();
        map.put("type", 2); //用户催单
        map.put("orderId", id);
        map.put("content", "订单号：" + orders.getNumber());

        webSocketServer.sendToAllClient(JSON.toJSONString(map));
    }
















}

